code: def left_right_halo_exchange(
      self,
      left_output_halo,
      right_output_halo,
      left_input_halo=None,
      right_input_halo=None,
  ):
      if left_input_halo is None:
          (
              left_input_halo,
              right_input_halo,
          ) = inc.left_right_halo_exchange(
              self.handle,
              self.left_rank,
              self.right_rank,
              left_output_halo,
              right_output_halo,
          )
          return left_input_halo, right_input_halo
      else:
          inc.left_right_halo_exchange_inplace(
              self.handle,
              self.left_rank,
              self.right_rank,
              left_output_halo,
              right_output_halo,
              left_input_halo,
              right_input_halo,
          )
  
imports: import torch
  import torch.distributed
  from torch import nn
  import nccl_p2p_cuda
  import peer_memory_cuda
label_desc: Use image node_id 2 for calling the HaloExchangerSendRecv obj's underlying member method code with example usage: obj.left_right_halo_exchange(left_output_halo, right_output_halo, left_input_halo, right_input_halo) and returns: left_input_halo,  right_input_halo